/* gv.c
*
- * Copyright (c) 1991-2000, Larry Wall
+ * Copyright (c) 1991-2002, Larry Wall
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
* laughed Pippin.
*/
+/*
+=head1 GV Functions
+*/
+
#include "EXTERN.h"
#define PERL_IN_GV_C
#include "perl.h"
{
if (!gv || SvTYPE((SV*)gv) != SVt_PVGV)
Perl_croak(aTHX_ "Bad symbol for filehandle");
- if (!GvIOp(gv))
+ if (!GvIOp(gv)) {
+#ifdef GV_UNIQUE_CHECK
+ if (GvUNIQUE(gv)) {
+ Perl_croak(aTHX_ "Bad symbol for filehandle (GV is unique)");
+ }
+#endif
GvIOp(gv) = newIO();
+ }
return gv;
}
GV *
Perl_gv_fetchfile(pTHX_ const char *name)
{
- dTHR;
char smallbuf[256];
char *tmpbuf;
STRLEN tmplen;
tmpbuf = smallbuf;
else
New(603, tmpbuf, tmplen + 1, char);
+ /* This is where the debugger's %{"::_<$filename"} hash is created */
tmpbuf[0] = '_';
tmpbuf[1] = '<';
strcpy(tmpbuf + 2, name);
gv_init(gv, PL_defstash, tmpbuf, tmplen, FALSE);
sv_setpv(GvSV(gv), name);
if (PERLDB_LINE)
- hv_magic(GvHVn(gv_AVadd(gv)), Nullgv, 'L');
+ hv_magic(GvHVn(gv_AVadd(gv)), Nullgv, PERL_MAGIC_dbfile);
}
if (tmpbuf != smallbuf)
Safefree(tmpbuf);
void
Perl_gv_init(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, int multi)
{
- dTHR;
register GP *gp;
bool doproto = SvTYPE(gv) > SVt_NULL;
char *proto = (doproto && SvPOK(gv)) ? SvPVX(gv) : NULL;
GvFILE(gv) = CopFILE(PL_curcop) ? CopFILE(PL_curcop) : "";
GvCVGEN(gv) = 0;
GvEGV(gv) = gv;
- sv_magic((SV*)gv, (SV*)gv, '*', Nullch, 0);
+ sv_magic((SV*)gv, (SV*)gv, PERL_MAGIC_glob, Nullch, 0);
GvSTASH(gv) = (HV*)SvREFCNT_inc(stash);
GvNAME(gv) = savepvn(name, len);
GvNAMELEN(gv) = len;
LEAVE;
PL_sub_generation++;
- CvGV(GvCV(gv)) = (GV*)SvREFCNT_inc(gv);
- CvFILE(GvCV(gv)) = CopFILE(PL_curcop);
+ CvGV(GvCV(gv)) = gv;
+ CvFILE_set_from_cop(GvCV(gv), PL_curcop);
CvSTASH(GvCV(gv)) = PL_curstash;
-#ifdef USE_THREADS
+#ifdef USE_5005THREADS
CvOWNER(GvCV(gv)) = 0;
if (!CvMUTEXP(GvCV(gv))) {
New(666, CvMUTEXP(GvCV(gv)), 1, perl_mutex);
MUTEX_INIT(CvMUTEXP(GvCV(gv)));
}
-#endif /* USE_THREADS */
+#endif /* USE_5005THREADS */
if (proto) {
sv_setpv((SV*)GvCV(gv), proto);
Safefree(proto);
Returns the glob with the given C<name> and a defined subroutine or
C<NULL>. The glob lives in the given C<stash>, or in the stashes
-accessible via @ISA and @UNIVERSAL.
+accessible via @ISA and UNIVERSAL::.
The argument C<level> should be either 0 or -1. If C<level==0>, as a
side-effect creates a glob with the given C<name> in the given C<stash>
which in the case of success contains an alias for the subroutine, and sets
-up caching info for this glob. Similarly for all the searched stashes.
+up caching info for this glob. Similarly for all the searched stashes.
This function grants C<"SUPER"> token as a postfix of the stash name. The
GV returned from C<gv_fetchmeth> may be a method cache entry, which is not
visible to Perl code. So when calling C<call_sv>, you should not use
the GV directly; instead, you should use the method's CV, which can be
-obtained from the GV with the C<GvCV> macro.
+obtained from the GV with the C<GvCV> macro.
=cut
*/
GV** gvp;
CV* cv;
- if (!stash)
- return 0;
+ /* UNIVERSAL methods should be callable without a stash */
+ if (!stash) {
+ level = -1; /* probably appropriate */
+ if(!(stash = gv_stashpvn("UNIVERSAL", 9, FALSE)))
+ return 0;
+ }
+
if ((level > 100) || (level < -100))
Perl_croak(aTHX_ "Recursive inheritance detected while looking for method '%s' in package '%s'",
name, HvNAME(stash));
basestash = gv_stashpvn(packname, packlen, TRUE);
gvp = (GV**)hv_fetch(basestash, "ISA", 3, FALSE);
if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (av = GvAV(gv))) {
- dTHR; /* just for SvREFCNT_dec */
gvp = (GV**)hv_fetch(stash, "ISA", 3, TRUE);
if (!gvp || !(gv = *gvp))
Perl_croak(aTHX_ "Cannot create %s::ISA", HvNAME(stash));
SV* sv = *svp++;
HV* basestash = gv_stashsv(sv, FALSE);
if (!basestash) {
- dTHR; /* just for ckWARN */
if (ckWARN(WARN_MISC))
- Perl_warner(aTHX_ WARN_MISC, "Can't locate package %s for @%s::ISA",
+ Perl_warner(aTHX_ packWARN(WARN_MISC), "Can't locate package %s for @%s::ISA",
SvPVX(sv), HvNAME(stash));
continue;
}
}
/*
+=for apidoc gv_fetchmeth_autoload
+
+Same as gv_fetchmeth(), but looks for autoloaded subroutines too.
+Returns a glob for the subroutine.
+
+For an autoloaded subroutine without a GV, will create a GV even
+if C<level < 0>. For an autoloaded subroutine without a stub, GvCV()
+of the result may be zero.
+
+=cut
+*/
+
+GV *
+Perl_gv_fetchmeth_autoload(pTHX_ HV *stash, const char *name, STRLEN len, I32 level)
+{
+ GV *gv = gv_fetchmeth(stash, name, len, level);
+
+ if (!gv) {
+ char autoload[] = "AUTOLOAD";
+ STRLEN autolen = sizeof(autoload)-1;
+ CV *cv;
+ GV **gvp;
+
+ if (!stash)
+ return Nullgv; /* UNIVERSAL::AUTOLOAD could cause trouble */
+ if (len == autolen && strnEQ(name, autoload, autolen))
+ return Nullgv;
+ if (!(gv = gv_fetchmeth(stash, autoload, autolen, FALSE)))
+ return Nullgv;
+ cv = GvCV(gv);
+ if (!(CvROOT(cv) || CvXSUB(cv)))
+ return Nullgv;
+ /* Have an autoload */
+ if (level < 0) /* Cannot do without a stub */
+ gv_fetchmeth(stash, name, len, 0);
+ gvp = (GV**)hv_fetch(stash, name, len, (level >= 0));
+ if (!gvp)
+ return Nullgv;
+ return *gvp;
+ }
+ return gv;
+}
+
+/*
=for apidoc gv_fetchmethod
See L<gv_fetchmethod_autoload>.
Returns the glob which contains the subroutine to call to invoke the method
on the C<stash>. In fact in the presence of autoloading this may be the
glob for "AUTOLOAD". In this case the corresponding variable $AUTOLOAD is
-already setup.
+already setup.
The third parameter of C<gv_fetchmethod_autoload> determines whether
AUTOLOAD lookup is performed if the given method is not present: non-zero
-means yes, look for AUTOLOAD; zero means no, don't look for AUTOLOAD.
+means yes, look for AUTOLOAD; zero means no, don't look for AUTOLOAD.
Calling C<gv_fetchmethod> is equivalent to calling C<gv_fetchmethod_autoload>
-with a non-zero C<autoload> parameter.
+with a non-zero C<autoload> parameter.
These functions grant C<"SUPER"> token as a prefix of the method name. Note
that if you want to keep the returned glob for a long time, you need to
check for it being "AUTOLOAD", since at the later time the call may load a
different subroutine due to $AUTOLOAD changing its value. Use the glob
-created via a side effect to do this.
+created via a side effect to do this.
These functions have the same side-effects and as C<gv_fetchmeth> with
C<level==0>. C<name> should be writable if contains C<':'> or C<'
''>. The warning against passing the GV returned by C<gv_fetchmeth> to
-C<call_sv> apply equally to these functions.
+C<call_sv> apply equally to these functions.
=cut
*/
GV *
Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload)
{
- dTHR;
register const char *nend;
const char *nsplit = 0;
GV* gv;
-
+
for (nend = name; *nend; nend++) {
if (*nend == '\'')
nsplit = nend;
/* ->SUPER::method should really be looked up in original stash */
SV *tmpstr = sv_2mortal(Perl_newSVpvf(aTHX_ "%s::SUPER",
CopSTASHPV(PL_curcop)));
+ /* __PACKAGE__::SUPER stash should be autovivified */
stash = gv_stashpvn(SvPVX(tmpstr), SvCUR(tmpstr), TRUE);
DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n",
origname, HvNAME(stash), name) );
}
- else
- stash = gv_stashpvn(origname, nsplit - origname, TRUE);
+ else {
+ /* don't autovifify if ->NoSuchStash::method */
+ stash = gv_stashpvn(origname, nsplit - origname, FALSE);
+
+ /* however, explicit calls to Pkg::SUPER::method may
+ happen, and may require autovivification to work */
+ if (!stash && (nsplit - origname) >= 7 &&
+ strnEQ(nsplit - 7, "::SUPER", 7) &&
+ gv_stashpvn(origname, nsplit - origname - 7, FALSE))
+ stash = gv_stashpvn(origname, nsplit - origname, TRUE);
+ }
}
gv = gv_fetchmeth(stash, name, nend - name, 0);
GV*
Perl_gv_autoload4(pTHX_ HV *stash, const char *name, STRLEN len, I32 method)
{
- dTHR;
- static char autoload[] = "AUTOLOAD";
- static STRLEN autolen = 8;
+ char autoload[] = "AUTOLOAD";
+ STRLEN autolen = sizeof(autoload)-1;
GV* gv;
CV* cv;
HV* varstash;
GV* vargv;
SV* varsv;
+ if (!stash)
+ return Nullgv; /* UNIVERSAL::AUTOLOAD could cause trouble */
if (len == autolen && strnEQ(name, autoload, autolen))
return Nullgv;
if (!(gv = gv_fetchmeth(stash, autoload, autolen, FALSE)))
return Nullgv;
cv = GvCV(gv);
- if (!CvROOT(cv))
+ if (!(CvROOT(cv) || CvXSUB(cv)))
return Nullgv;
/*
* Inheriting AUTOLOAD for non-methods works ... for now.
*/
- if (ckWARN(WARN_DEPRECATED) && !method &&
+ if (ckWARN2(WARN_DEPRECATED, WARN_SYNTAX) && !method &&
(GvCVGEN(gv) || GvSTASH(gv) != stash))
- Perl_warner(aTHX_ WARN_DEPRECATED,
+ Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX),
"Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated",
HvNAME(stash), (int)len, name);
+#ifndef USE_5005THREADS
+ if (CvXSUB(cv)) {
+ /* rather than lookup/init $AUTOLOAD here
+ * only to have the XSUB do another lookup for $AUTOLOAD
+ * and split that value on the last '::',
+ * pass along the same data via some unused fields in the CV
+ */
+ CvSTASH(cv) = stash;
+ SvPVX(cv) = (char *)name; /* cast to lose constness warning */
+ SvCUR(cv) = len;
+ return gv;
+ }
+#endif
+
/*
* Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name.
* The subroutine's original name may not be "AUTOLOAD", so we don't
vargv = *(GV**)hv_fetch(varstash, autoload, autolen, TRUE);
ENTER;
-#ifdef USE_THREADS
+#ifdef USE_5005THREADS
sv_lock((SV *)varstash);
#endif
if (!isGV(vargv))
gv_init(vargv, varstash, autoload, autolen, FALSE);
LEAVE;
varsv = GvSV(vargv);
-#ifdef USE_THREADS
+#ifdef USE_5005THREADS
sv_lock(varsv);
#endif
sv_setpv(varsv, HvNAME(stash));
return gv;
}
+/* The "gv" parameter should be the glob known to Perl code as *!
+ * The scalar must already have been magicalized.
+ */
+STATIC void
+S_require_errno(pTHX_ GV *gv)
+{
+ HV* stash = gv_stashpvn("Errno",5,FALSE);
+
+ if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) {
+ dSP;
+ PUTBACK;
+ ENTER;
+ save_scalar(gv); /* keep the value of $! */
+ Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT,
+ newSVpvn("Errno",5), Nullsv);
+ LEAVE;
+ SPAGAIN;
+ stash = gv_stashpvn("Errno",5,FALSE);
+ if (!stash || !(gv_fetchmethod(stash, "TIEHASH")))
+ Perl_croak(aTHX_ "Can't use %%! because Errno.pm is not available");
+ }
+}
+
/*
=for apidoc gv_stashpv
GV *
Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, I32 sv_type)
{
- dTHR;
register const char *name = nambeg;
register GV *gv = 0;
GV**gvp;
char smallbuf[256];
char *tmpbuf;
- if (len + 3 < sizeof smallbuf)
+ if (len + 3 < sizeof (smallbuf))
tmpbuf = smallbuf;
else
New(601, tmpbuf, len+3, char);
: sv_type == SVt_PVAV ? "@"
: sv_type == SVt_PVHV ? "%"
: ""), name));
- stash = PL_nullstash;
}
- else
- return Nullgv;
+ return Nullgv;
}
if (!SvREFCNT(stash)) /* symbol table under destruction */
if (add) {
GvMULTI_on(gv);
gv_init_sv(gv, sv_type);
+ if (*name=='!' && sv_type == SVt_PVHV && len==1)
+ require_errno(gv);
}
return gv;
} else if (add & GV_NOINIT) {
/* Adding a new symbol */
if (add & GV_ADDWARN && ckWARN_d(WARN_INTERNAL))
- Perl_warner(aTHX_ WARN_INTERNAL, "Had to create %s unexpectedly", nambeg);
+ Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "Had to create %s unexpectedly", nambeg);
gv_init(gv, stash, name, len, add & GV_ADDMULTI);
gv_init_sv(gv, sv_type);
- if (isLEXWARN_on && isALPHA(name[0]) && ! ckWARN(WARN_ONCE))
+ if (isALPHA(name[0]) && ! (isLEXWARN_on ? ckWARN(WARN_ONCE)
+ : (PL_dowarn & G_WARN_ON ) ) )
GvMULTI_on(gv) ;
/* set up magic where warranted */
if (strEQ(name, "ISA")) {
AV* av = GvAVn(gv);
GvMULTI_on(gv);
- sv_magic((SV*)av, (SV*)gv, 'I', Nullch, 0);
+ sv_magic((SV*)av, (SV*)gv, PERL_MAGIC_isa, Nullch, 0);
/* NOTE: No support for tied ISA */
if ((add & GV_ADDMULTI) && strEQ(nambeg,"AnyDBM_File::ISA")
&& AvFILLp(av) == -1)
if (strEQ(name, "OVERLOAD")) {
HV* hv = GvHVn(gv);
GvMULTI_on(gv);
- hv_magic(hv, Nullgv, 'A');
+ hv_magic(hv, Nullgv, PERL_MAGIC_overload);
}
break;
case 'S':
HV *hv;
I32 i;
if (!PL_psig_ptr) {
- int sig_num[] = { SIG_NUM };
- New(73, PL_psig_ptr, sizeof(sig_num)/sizeof(*sig_num), SV*);
- New(73, PL_psig_name, sizeof(sig_num)/sizeof(*sig_num), SV*);
+ Newz(73, PL_psig_ptr, SIG_SIZE, SV*);
+ Newz(73, PL_psig_name, SIG_SIZE, SV*);
+ Newz(73, PL_psig_pend, SIG_SIZE, int);
}
GvMULTI_on(gv);
hv = GvHVn(gv);
- hv_magic(hv, Nullgv, 'S');
- for (i = 1; PL_sig_name[i]; i++) {
+ hv_magic(hv, Nullgv, PERL_MAGIC_sig);
+ for (i = 1; i < SIG_SIZE; i++) {
SV ** init;
init = hv_fetch(hv, PL_sig_name[i], strlen(PL_sig_name[i]), 1);
if (init)
sv_setsv(*init, &PL_sv_undef);
PL_psig_ptr[i] = 0;
PL_psig_name[i] = 0;
+ PL_psig_pend[i] = 0;
}
}
break;
break;
case '&':
- if (len > 1)
- break;
- PL_sawampersand = TRUE;
- goto ro_magicalize;
-
case '`':
- if (len > 1)
- break;
- PL_sawampersand = TRUE;
- goto ro_magicalize;
-
case '\'':
- if (len > 1)
- break;
+ if (
+ len > 1 ||
+ sv_type == SVt_PVAV ||
+ sv_type == SVt_PVHV ||
+ sv_type == SVt_PVCV ||
+ sv_type == SVt_PVFM ||
+ sv_type == SVt_PVIO
+ ) { break; }
PL_sawampersand = TRUE;
goto ro_magicalize;
case '!':
if (len > 1)
break;
- if (sv_type > SVt_PV && PL_curcop != &PL_compiling) {
- HV* stash = gv_stashpvn("Errno",5,FALSE);
- if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) {
- dSP;
- PUTBACK;
- require_pv("Errno.pm");
- SPAGAIN;
- stash = gv_stashpvn("Errno",5,FALSE);
- if (!stash || !(gv_fetchmethod(stash, "TIEHASH")))
- Perl_croak(aTHX_ "Can't use %%! because Errno.pm is not available");
- }
- }
- goto magicalize;
+
+ /* If %! has been used, automatically load Errno.pm.
+ The require will itself set errno, so in order to
+ preserve its value we have to set up the magic
+ now (rather than going to magicalize)
+ */
+
+ sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, len);
+
+ if (sv_type == SVt_PVHV)
+ require_errno(gv);
+
+ break;
case '-':
if (len > 1)
break;
else {
AV* av = GvAVn(gv);
- sv_magic((SV*)av, Nullsv, 'D', Nullch, 0);
+ sv_magic((SV*)av, Nullsv, PERL_MAGIC_regdata, Nullch, 0);
SvREADONLY_on(av);
}
goto magicalize;
case '#':
case '*':
- if (ckWARN(WARN_DEPRECATED) && len == 1 && sv_type == SVt_PV)
- Perl_warner(aTHX_ WARN_DEPRECATED, "Use of $%s is deprecated", name);
+ if (ckWARN2(WARN_DEPRECATED, WARN_SYNTAX) && len == 1 && sv_type == SVt_PV)
+ Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), "Use of $%s is deprecated", name);
/* FALL THROUGH */
case '[':
case '^':
case ',':
case '\\':
case '/':
- case '|':
case '\001': /* $^A */
case '\003': /* $^C */
case '\004': /* $^D */
- case '\005': /* $^E */
case '\006': /* $^F */
case '\010': /* $^H */
case '\011': /* $^I, NOT \t in EBCDIC */
- case '\017': /* $^O */
+ case '\016': /* $^N */
case '\020': /* $^P */
- case '\024': /* $^T */
if (len > 1)
break;
goto magicalize;
+ case '|':
+ if (len > 1)
+ break;
+ sv_setiv(GvSV(gv), (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0);
+ goto magicalize;
+ case '\005': /* $^E && $^ENCODING */
+ if (len > 1 && strNE(name, "\005NCODING"))
+ break;
+ goto magicalize;
+
+ case '\017': /* $^O & $^OPEN */
+ if (len > 1 && strNE(name, "\017PEN"))
+ break;
+ goto magicalize;
case '\023': /* $^S */
if (len > 1)
break;
goto ro_magicalize;
+ case '\024': /* $^T, ${^TAINT} */
+ if (len == 1)
+ goto magicalize;
+ else if (strEQ(name, "\024AINT"))
+ goto ro_magicalize;
+ else
+ break;
case '\027': /* $^W & $^WARNING_BITS */
if (len > 1 && strNE(name, "\027ARNING_BITS")
&& strNE(name, "\027IDE_SYSTEM_CALLS"))
break;
else {
AV* av = GvAVn(gv);
- sv_magic((SV*)av, (SV*)av, 'D', Nullch, 0);
+ sv_magic((SV*)av, (SV*)av, PERL_MAGIC_regdata, Nullch, 0);
SvREADONLY_on(av);
}
/* FALL THROUGH */
case '7':
case '8':
case '9':
+ /* ensures variable is only digits */
+ /* ${"1foo"} fails this test (and is thus writeable) */
+ /* added by japhy, but borrowed from is_gv_magical */
+
+ if (len > 1) {
+ const char *end = name + len;
+ while (--end > name) {
+ if (!isDIGIT(*end)) return gv;
+ }
+ }
+
ro_magicalize:
SvREADONLY_on(GvSV(gv));
magicalize:
- sv_magic(GvSV(gv), (SV*)gv, 0, name, len);
+ sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, len);
break;
case '\014': /* $^L */
void
Perl_gv_fullname3(pTHX_ SV *sv, GV *gv, const char *prefix)
{
- HV *hv = GvSTASH(gv);
- if (!hv) {
- (void)SvOK_off(sv);
- return;
- }
- sv_setpv(sv, prefix ? prefix : "");
- sv_catpv(sv,HvNAME(hv));
- sv_catpvn(sv,"::", 2);
- sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv));
+ gv_fullname4(sv, gv, prefix, TRUE);
}
void
void
Perl_gv_efullname3(pTHX_ SV *sv, GV *gv, const char *prefix)
{
- GV *egv = GvEGV(gv);
- if (!egv)
- egv = gv;
- gv_fullname3(sv, egv, prefix);
+ gv_efullname4(sv, gv, prefix, TRUE);
}
/* XXX compatibility with versions <= 5.003. */
IO *
Perl_newIO(pTHX)
{
- dTHR;
IO *io;
GV *iogv;
void
Perl_gv_check(pTHX_ HV *stash)
{
- dTHR;
register HE *entry;
register I32 i;
register GV *gv;
for (i = 0; i <= (I32) HvMAX(stash); i++) {
for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) {
if (HeKEY(entry)[HeKLEN(entry)-1] == ':' &&
- (gv = (GV*)HeVAL(entry)) && (hv = GvHV(gv)) && HvNAME(hv))
+ (gv = (GV*)HeVAL(entry)) && (hv = GvHV(gv)))
{
if (hv != PL_defstash && hv != stash)
gv_check(hv); /* nested package */
* module, don't bother warning */
if (file
&& PERL_FILE_IS_ABSOLUTE(file)
- && (instr(file, "/lib/") || instr(file, ".pm")))
+#ifdef MACOS_TRADITIONAL
+ && (instr(file, ":lib:")
+#else
+ && (instr(file, "/lib/")
+#endif
+ || instr(file, ".pm")))
{
continue;
}
#else
CopFILEGV(PL_curcop) = gv_fetchfile(file);
#endif
- Perl_warner(aTHX_ WARN_ONCE,
+ Perl_warner(aTHX_ packWARN(WARN_ONCE),
"Name \"%s::%s\" used only once: possible typo",
HvNAME(stash), GvNAME(gv));
}
void
Perl_gp_free(pTHX_ GV *gv)
{
- dTHR;
GP* gp;
if (!gv || !(gp = GvGP(gv)))
return;
if (gp->gp_refcnt == 0) {
if (ckWARN_d(WARN_INTERNAL))
- Perl_warner(aTHX_ WARN_INTERNAL,
+ Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
"Attempt to free unreferenced glob pointers");
return;
}
GvGP(gv) = 0;
}
-#if defined(CRIPPLED_CC) && (defined(iAPX286) || defined(M_I286) || defined(I80286))
-#define MICROPORT
-#endif
-
-#ifdef MICROPORT /* Microport 2.4 hack */
-AV *GvAVn(gv)
-register GV *gv;
-{
- if (GvGP(gv)->gp_av)
- return GvGP(gv)->gp_av;
- else
- return GvGP(gv_AVadd(gv))->gp_av;
-}
-
-HV *GvHVn(gv)
-register GV *gv;
+int
+Perl_magic_freeovrld(pTHX_ SV *sv, MAGIC *mg)
{
- if (GvGP(gv)->gp_hv)
- return GvGP(gv)->gp_hv;
- else
- return GvGP(gv_HVadd(gv))->gp_hv;
+ AMT *amtp = (AMT*)mg->mg_ptr;
+ if (amtp && AMT_AMAGIC(amtp)) {
+ int i;
+ for (i = 1; i < NofAMmeth; i++) {
+ CV *cv = amtp->table[i];
+ if (cv != Nullcv) {
+ SvREFCNT_dec((SV *) cv);
+ amtp->table[i] = Nullcv;
+ }
+ }
+ }
+ return 0;
}
-#endif /* Microport 2.4 hack */
/* Updates and caches the CV's */
bool
Perl_Gv_AMupdate(pTHX_ HV *stash)
{
- dTHR;
GV* gv;
CV* cv;
- MAGIC* mg=mg_find((SV*)stash,'c');
+ MAGIC* mg=mg_find((SV*)stash, PERL_MAGIC_overload_table);
AMT *amtp = (mg) ? (AMT*)mg->mg_ptr: (AMT *) NULL;
AMT amt;
- STRLEN n_a;
-#ifdef OVERLOAD_VIA_HASH
- GV** gvp;
- HV* hv;
-#endif
if (mg && amtp->was_ok_am == PL_amagic_generation
&& amtp->was_ok_sub == PL_sub_generation)
- return AMT_AMAGIC(amtp);
- if (amtp && AMT_AMAGIC(amtp)) { /* Have table. */
- int i;
- for (i=1; i<NofAMmeth; i++) {
- if (amtp->table[i]) {
- SvREFCNT_dec(amtp->table[i]);
- }
- }
- }
- sv_unmagic((SV*)stash, 'c');
+ return (bool)AMT_OVERLOADED(amtp);
+ sv_unmagic((SV*)stash, PERL_MAGIC_overload_table);
DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME(stash)) );
+ Zero(&amt,1,AMT);
amt.was_ok_am = PL_amagic_generation;
amt.was_ok_sub = PL_sub_generation;
amt.fallback = AMGfallNO;
amt.flags = 0;
-#ifdef OVERLOAD_VIA_HASH
- gvp=(GV**)hv_fetch(stash,"OVERLOAD",8,FALSE); /* A shortcut */
- if (gvp && ((gv = *gvp) != (GV*)&PL_sv_undef && (hv = GvHV(gv)))) {
- int filled=0;
- int i;
- char *cp;
- SV* sv;
- SV** svp;
-
- /* Work with "fallback" key, which we assume to be first in PL_AMG_names */
-
- if (( cp = (char *)PL_AMG_names[0] ) &&
- (svp = (SV**)hv_fetch(hv,cp,strlen(cp),FALSE)) && (sv = *svp)) {
- if (SvTRUE(sv)) amt.fallback=AMGfallYES;
- else if (SvOK(sv)) amt.fallback=AMGfallNEVER;
- }
- for (i = 1; i < NofAMmeth; i++) {
- cv = 0;
- cp = (char *)PL_AMG_names[i];
-
- svp = (SV**)hv_fetch(hv, cp, strlen(cp), FALSE);
- if (svp && ((sv = *svp) != &PL_sv_undef)) {
- switch (SvTYPE(sv)) {
- default:
- if (!SvROK(sv)) {
- if (!SvOK(sv)) break;
- gv = gv_fetchmethod(stash, SvPV(sv, n_a));
- if (gv) cv = GvCV(gv);
- break;
- }
- cv = (CV*)SvRV(sv);
- if (SvTYPE(cv) == SVt_PVCV)
- break;
- /* FALL THROUGH */
- case SVt_PVHV:
- case SVt_PVAV:
- Perl_croak(aTHX_ "Not a subroutine reference in overload table");
- return FALSE;
- case SVt_PVCV:
- cv = (CV*)sv;
- break;
- case SVt_PVGV:
- if (!(cv = GvCVu((GV*)sv)))
- cv = sv_2cv(sv, &stash, &gv, FALSE);
- break;
- }
- if (cv) filled=1;
- else {
- Perl_croak(aTHX_ "Method for operation %s not found in package %.256s during blessing\n",
- cp,HvNAME(stash));
- return FALSE;
- }
- }
-#else
{
- int filled = 0;
- int i;
- const char *cp;
+ int filled = 0, have_ovl = 0;
+ int i, lim = 1;
SV* sv = NULL;
/* Work with "fallback" key, which we assume to be first in PL_AMG_names */
- if ((cp = PL_AMG_names[0])) {
- /* Try to find via inheritance. */
- gv = gv_fetchmeth(stash, "()", 2, -1); /* A cookie: "()". */
- if (gv)
- sv = GvSV(gv);
-
- if (!gv)
- goto no_table;
- else if (SvTRUE(sv))
- amt.fallback=AMGfallYES;
- else if (SvOK(sv))
- amt.fallback=AMGfallNEVER;
- }
+ /* Try to find via inheritance. */
+ gv = gv_fetchmeth(stash, PL_AMG_names[0], 2, -1);
+ if (gv)
+ sv = GvSV(gv);
+
+ if (!gv)
+ lim = DESTROY_amg; /* Skip overloading entries. */
+ else if (SvTRUE(sv))
+ amt.fallback=AMGfallYES;
+ else if (SvOK(sv))
+ amt.fallback=AMGfallNEVER;
+
+ for (i = 1; i < lim; i++)
+ amt.table[i] = Nullcv;
+ for (; i < NofAMmeth; i++) {
+ char *cooky = (char*)PL_AMG_names[i];
+ /* Human-readable form, for debugging: */
+ char *cp = (i >= DESTROY_amg ? cooky : AMG_id2name(i));
+ STRLEN l = strlen(cooky);
- for (i = 1; i < NofAMmeth; i++) {
- SV *cookie = sv_2mortal(Perl_newSVpvf(aTHX_ "(%s", cp = PL_AMG_names[i]));
DEBUG_o( Perl_deb(aTHX_ "Checking overloading of `%s' in package `%.256s'\n",
cp, HvNAME(stash)) );
- /* don't fill the cache while looking up! */
- gv = gv_fetchmeth(stash, SvPVX(cookie), SvCUR(cookie), -1);
+ /* don't fill the cache while looking up!
+ Creation of inheritance stubs in intermediate packages may
+ conflict with the logic of runtime method substitution.
+ Indeed, for inheritance A -> B -> C, if C overloads "+0",
+ then we could have created stubs for "(+0" in A and C too.
+ But if B overloads "bool", we may want to use it for
+ numifying instead of C's "+0". */
+ if (i >= DESTROY_amg)
+ gv = Perl_gv_fetchmeth_autoload(aTHX_ stash, cooky, l, 0);
+ else /* Autoload taken care of below */
+ gv = Perl_gv_fetchmeth(aTHX_ stash, cooky, l, -1);
cv = 0;
- if(gv && (cv = GvCV(gv))) {
+ if (gv && (cv = GvCV(gv))) {
if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil")
&& strEQ(HvNAME(GvSTASH(CvGV(cv))), "overload")) {
+ /* This is a hack to support autoloading..., while
+ knowing *which* methods were declared as overloaded. */
/* GvSV contains the name of the method. */
- GV *ngv;
+ GV *ngv = Nullgv;
- DEBUG_o( Perl_deb(aTHX_ "Resolving method `%.256s' for overloaded `%s' in package `%.256s'\n",
- SvPV(GvSV(gv), n_a), cp, HvNAME(stash)) );
- if (!SvPOK(GvSV(gv))
+ DEBUG_o( Perl_deb(aTHX_ "Resolving method `%.256s' for overloaded `%s' in package `%.256s'\n",
+ SvPV_nolen(GvSV(gv)), cp, HvNAME(stash)) );
+ if (!SvPOK(GvSV(gv))
|| !(ngv = gv_fetchmethod_autoload(stash, SvPVX(GvSV(gv)),
FALSE)))
{
/* Can be an import stub (created by `can'). */
if (GvCVGEN(gv)) {
- Perl_croak(aTHX_ "Stub found while resolving method `%.256s' overloading `%s' in package `%.256s'",
+ Perl_croak(aTHX_ "Stub found while resolving method `%.256s' overloading `%s' in package `%.256s'",
(SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ),
cp, HvNAME(stash));
} else
- Perl_croak(aTHX_ "Can't resolve method `%.256s' overloading `%s' in package `%.256s'",
+ Perl_croak(aTHX_ "Can't resolve method `%.256s' overloading `%s' in package `%.256s'",
(SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ),
cp, HvNAME(stash));
}
cp, HvNAME(stash), HvNAME(GvSTASH(CvGV(cv))),
GvNAME(CvGV(cv))) );
filled = 1;
+ if (i < DESTROY_amg)
+ have_ovl = 1;
+ } else if (gv) { /* Autoloaded... */
+ cv = (CV*)gv;
+ filled = 1;
}
-#endif
amt.table[i]=(CV*)SvREFCNT_inc(cv);
}
if (filled) {
AMT_AMAGIC_on(&amt);
- sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMT));
- return TRUE;
+ if (have_ovl)
+ AMT_OVERLOADED_on(&amt);
+ sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table,
+ (char*)&amt, sizeof(AMT));
+ return have_ovl;
}
}
/* Here we have no table: */
- no_table:
+ /* no_table: */
AMT_AMAGIC_off(&amt);
- sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMTS));
+ sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table,
+ (char*)&amt, sizeof(AMTS));
return FALSE;
}
+
+CV*
+Perl_gv_handler(pTHX_ HV *stash, I32 id)
+{
+ MAGIC *mg;
+ AMT *amtp;
+ CV *ret;
+
+ if (!stash)
+ return Nullcv;
+ mg = mg_find((SV*)stash, PERL_MAGIC_overload_table);
+ if (!mg) {
+ do_update:
+ Gv_AMupdate(stash);
+ mg = mg_find((SV*)stash, PERL_MAGIC_overload_table);
+ }
+ amtp = (AMT*)mg->mg_ptr;
+ if ( amtp->was_ok_am != PL_amagic_generation
+ || amtp->was_ok_sub != PL_sub_generation )
+ goto do_update;
+ if (AMT_AMAGIC(amtp)) {
+ ret = amtp->table[id];
+ if (ret && isGV(ret)) { /* Autoloading stab */
+ /* Passing it through may have resulted in a warning
+ "Inherited AUTOLOAD for a non-method deprecated", since
+ our caller is going through a function call, not a method call.
+ So return the CV for AUTOLOAD, setting $AUTOLOAD. */
+ GV *gv = gv_fetchmethod(stash, (char*)PL_AMG_names[id]);
+
+ if (gv && GvCV(gv))
+ return GvCV(gv);
+ }
+ return ret;
+ }
+
+ return Nullcv;
+}
+
+
SV*
Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags)
{
- dTHR;
- MAGIC *mg;
- CV *cv;
+ MAGIC *mg;
+ CV *cv=NULL;
CV **cvp=NULL, **ocvp=NULL;
- AMT *amtp, *oamtp;
- int fl=0, off, off1, lr=0, assign=AMGf_assign & flags, notfound=0;
+ AMT *amtp=NULL, *oamtp=NULL;
+ int off=0, off1, lr=0, assign=AMGf_assign & flags, notfound=0;
int postpr = 0, force_cpy = 0, assignshift = assign ? 1 : 0;
- HV* stash;
+#ifdef DEBUGGING
+ int fl=0;
+#endif
+ HV* stash=NULL;
if (!(AMGf_noleft & flags) && SvAMAGIC(left)
- && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(left))),'c'))
- && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr)
+ && (stash = SvSTASH(SvRV(left)))
+ && (mg = mg_find((SV*)stash, PERL_MAGIC_overload_table))
+ && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr)
? (oamtp = amtp = (AMT*)mg->mg_ptr)->table
: (CV **) NULL))
- && ((cv = cvp[off=method+assignshift])
+ && ((cv = cvp[off=method+assignshift])
|| (assign && amtp->fallback > AMGfallNEVER && /* fallback to
* usual method */
- (fl = 1, cv = cvp[off=method])))) {
+ (
+#ifdef DEBUGGING
+ fl = 1,
+#endif
+ cv = cvp[off=method])))) {
lr = -1; /* Call method for left argument */
} else {
if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) {
(void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg]));
break;
case not_amg:
- (void)((cv = cvp[off=bool__amg])
+ (void)((cv = cvp[off=bool__amg])
|| (cv = cvp[off=numer_amg])
|| (cv = cvp[off=string_amg]));
postpr = 1;
}
break;
case abs_amg:
- if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg])
+ if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg])
&& ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) {
SV* nullsv=sv_2mortal(newSViv(0));
if (off1==lt_amg) {
lr = 1;
}
break;
+ case int_amg:
case iter_amg: /* XXXX Eventually should do to_gv. */
+ /* FAIL safe */
+ return NULL; /* Delegate operation to standard mechanisms. */
+ break;
case to_sv_amg:
case to_av_amg:
case to_hv_amg:
case to_gv_amg:
case to_cv_amg:
/* FAIL safe */
- return NULL; /* Delegate operation to standard mechanisms. */
+ return left; /* Delegate operation to standard mechanisms. */
break;
default:
goto not_found;
}
if (!cv) goto not_found;
} else if (!(AMGf_noright & flags) && SvAMAGIC(right)
- && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(right))),'c'))
- && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr)
+ && (stash = SvSTASH(SvRV(right)))
+ && (mg = mg_find((SV*)stash, PERL_MAGIC_overload_table))
+ && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr)
? (amtp = (AMT*)mg->mg_ptr)->table
: (CV **) NULL))
&& (cv = cvp[off=method])) { /* Method for right
* argument found */
lr=1;
- } else if (((ocvp && oamtp->fallback > AMGfallNEVER
- && (cvp=ocvp) && (lr = -1))
+ } else if (((ocvp && oamtp->fallback > AMGfallNEVER
+ && (cvp=ocvp) && (lr = -1))
|| (cvp && amtp->fallback > AMGfallNEVER && (lr=1)))
&& !(flags & AMGf_unary)) {
/* We look for substitution for
}
} else {
not_found: /* No method found, either report or croak */
+ switch (method) {
+ case to_sv_amg:
+ case to_av_amg:
+ case to_hv_amg:
+ case to_gv_amg:
+ case to_cv_amg:
+ /* FAIL safe */
+ return left; /* Delegate operation to standard mechanisms. */
+ break;
+ }
if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */
notfound = 1; lr = -1;
} else if (cvp && (cv=cvp[nomethod_amg])) {
} else {
SV *msg;
if (off==-1) off=method;
- msg = sv_2mortal(Perl_newSVpvf(aTHX_
+ msg = sv_2mortal(Perl_newSVpvf(aTHX_
"Operation `%s': no method found,%sargument %s%s%s%s",
- PL_AMG_names[method + assignshift],
+ AMG_id2name(method + assignshift),
(flags & AMGf_unary ? " " : "\n\tleft "),
- SvAMAGIC(left)?
+ SvAMAGIC(left)?
"in overloaded package ":
"has no overloaded magic",
- SvAMAGIC(left)?
+ SvAMAGIC(left)?
HvNAME(SvSTASH(SvRV(left))):
"",
- SvAMAGIC(right)?
+ SvAMAGIC(right)?
",\n\tright argument in overloaded package ":
- (flags & AMGf_unary
+ (flags & AMGf_unary
? ""
: ",\n\tright argument has no overloaded magic"),
- SvAMAGIC(right)?
+ SvAMAGIC(right)?
HvNAME(SvSTASH(SvRV(right))):
""));
if (amtp && amtp->fallback >= AMGfallYES) {
force_cpy = force_cpy || assign;
}
}
+#ifdef DEBUGGING
if (!notfound) {
- DEBUG_o( Perl_deb(aTHX_
- "Overloaded operator `%s'%s%s%s:\n\tmethod%s found%s in package %s%s\n",
- PL_AMG_names[off],
- method+assignshift==off? "" :
- " (initially `",
- method+assignshift==off? "" :
- PL_AMG_names[method+assignshift],
- method+assignshift==off? "" : "')",
- flags & AMGf_unary? "" :
- lr==1 ? " for right argument": " for left argument",
- flags & AMGf_unary? " for argument" : "",
- HvNAME(stash),
- fl? ",\n\tassignment variant used": "") );
+ DEBUG_o(Perl_deb(aTHX_
+ "Overloaded operator `%s'%s%s%s:\n\tmethod%s found%s in package %s%s\n",
+ AMG_id2name(off),
+ method+assignshift==off? "" :
+ " (initially `",
+ method+assignshift==off? "" :
+ AMG_id2name(method+assignshift),
+ method+assignshift==off? "" : "')",
+ flags & AMGf_unary? "" :
+ lr==1 ? " for right argument": " for left argument",
+ flags & AMGf_unary? " for argument" : "",
+ stash ? HvNAME(stash) : "null",
+ fl? ",\n\tassignment variant used": "") );
}
+#endif
/* Since we use shallow copy during assignment, we need
* to dublicate the contents, probably calling user-supplied
* version of copy operator
* b) Increment or decrement, called directly.
* assignshift==0, assign==0, method + 0 == off
* c) Increment or decrement, translated to assignment add/subtr.
- * assignshift==0, assign==T,
+ * assignshift==0, assign==T,
* force_cpy == T
* d) Increment or decrement, translated to nomethod.
- * assignshift==0, assign==0,
+ * assignshift==0, assign==0,
* force_cpy == T
* e) Assignment form translated to nomethod.
* assignshift==1, assign==T, method + 1 != off
PUSHs(lr>0? left: right);
PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no ));
if (notfound) {
- PUSHs( sv_2mortal(newSVpv((char *)PL_AMG_names[method + assignshift],0)));
+ PUSHs( sv_2mortal(newSVpv(AMG_id2name(method + assignshift),0)));
}
PUSHs((SV*)cv);
PUTBACK;
CATCH_SET(oldcatch);
if (postpr) {
- int ans;
+ int ans=0;
switch (method) {
case le_amg:
case sle_amg:
if (len == 3 && strEQ(name, "SIG"))
goto yes;
break;
+ case '\017': /* $^O & $^OPEN */
+ if (len == 1
+ || (len == 4 && strEQ(name, "\017PEN")))
+ {
+ goto yes;
+ }
+ break;
case '\027': /* $^W & $^WARNING_BITS */
if (len == 1
|| (len == 12 && strEQ(name, "\027ARNING_BITS"))
case '\010': /* $^H */
case '\011': /* $^I, NOT \t in EBCDIC */
case '\014': /* $^L */
- case '\017': /* $^O */
+ case '\016': /* $^N */
case '\020': /* $^P */
case '\023': /* $^S */
- case '\024': /* $^T */
case '\026': /* $^V */
if (len == 1)
goto yes;
break;
+ case '\024': /* $^T, ${^TAINT} */
+ if (len == 1 || strEQ(name, "\024AINT"))
+ goto yes;
+ break;
case '1':
case '2':
case '3':